Authorities say the remains are being examined to determine if they are human or animal

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Investigators are going over the Garrido property with a fine-toothed comb.

More bones were found on Phillip Garrido's Antioch property, police announced on Friday.

The late afternoon announcement from police makes for another significant element that may help police find two missing bay area girls.

Investigators Search Home Next Door to Garrido Property

The house next door to Phillip Garrido's is cordoned off with police tape and declared a crime scene as detectives and cadaver dogs search the two properties, looking into the murders of several women in the area as they continue the investigation of the Dugard kidnapping and captivity case. (Published Monday, Aug. 31, 2009)

But the teams of investigators are looking for clues that may connect Phillip and Nancy Garrido to two 20-year-old missing person cases,. They hope all their work will pay off.

Experts used a special scanning device to detect possible human remains underground.

Unraveling Phillip Garrido's Sinister Past

Court documents show Phillip Garrido's 1976 rape victim "was just a fantasy he had to live out." The papers also say Garrido abused drugs, especially LSD, and was diagnosed with mixed sexual deviation and chronic drug abuse. (Published Wednesday, Sept. 2, 2009)

"We're removing concrete slabs that inhibited dogs and machinery to get a look at that area," Kurt von Savoye of the Dublin Police Department said. "(We" removed sheds that the dogs and machinery couldn't get to before."